I had the same problem with my ROG Zenith 2 Extreme... crackling / popping sounds etc.
After a while i was so annoyed so I've tried a usb sound card, which had no issues. So I've dropped the board to the RMA process - no success --> they didn't find anything.
I spent hours on googling possible reasons. Most hints were pointing towards driver and software (e.g. HWInfo,...) related issues.
OK. So I had a clean Windows installation with the latest BIOS, drivers and minimum Software and recommended settings.
Everything worked fine, but then it started again... so I've plugged the USB sound card again. :cool:
Everything worked fine for a while, but then it started again!!! :mad:
I've started messing around with the sound settings as recommended --> no success 😞
But with those events the reason was finally clear for me.
- SOLUTION -
I've installed the latest Bitsum Process Lasso because it makes the CPU more efficient thru load balancing on all cores (probably not necessary, but I recommend it) AND the MOST IMPORTANT PART --> set the system energy settings to High Performance!
It seems to be a AMD-Windows issue that when the settings are on "save energy" or "balanced" the crackling / popping sounds etc. occurs when there is more load. It seems that the sound device has a small priority and/or suffers a lack of minimum energy. Only with the right Power Setting all other hints where/are obsolet and I could/can mess around with the sound settings with no issues!!!!
My system is running for 7 weeks and never had any sound problems anymore 🙂